DTC Confirmation Test (Overall Function Check)

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the following test to check overall function of vacuum cut valve by-pass valve. During this test, DTC may not be confirmed.

Malfunction is detected when vacuum cut valve by-pass valve does not operate properly. Possible causes are:

Defective vacuum cut valve by-pass valve.
Defective vacuum cut valve.
Blockage in by-pass hoses.
Faulty EVAP Control System Pressure Sensor (EVAP-CSPS) or circuit.
Defective EVAP Canister Vent Control Valve (EVAP-CVCV).
Blockage in hoses between fuel tank and vacuum cut valve.
Blockage in hoses between EVAP canister and vacuum cut valve.
Defective EVAP canister.
Blockage in EVAP purge port of fuel tank.

To check overall function of vacuum cut valve by-pass valve, perform step 1 of DIAGNOSTIC PROCEDURE.